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Treating method for silver electrodes used for ion chromatography electrochemistry amperometric detection

A technology of amperometric detection and ion chromatography, which is applied in the processing field of silver electrodes for electrochemical amperometric detection of ion chromatography, can solve the problems of affecting the detection effect of electrochemical detectors, short service life of silver electrodes, small detection current value, etc., and achieves improvement The effect of detection current upper limit and detection life, large real area and strong inertia

Active Publication Date: 2019-09-17
JIAXING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a treatment method for the silver electrode used in the electrochemical amperometric detection of ion chromatography, which is used to solve the problem that the service life of the silver electrode of the electrochemical detector used in the existing electrochemical detection technology is relatively short, and when continuous testing is carried out The post-current attenuation is relatively obvious, and the detection current value is small, which greatly affects the technical problem of the detection effect of the electrochemical detector to detect the substance information

Method used

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  • Treating method for silver electrodes used for ion chromatography electrochemistry amperometric detection
  • Treating method for silver electrodes used for ion chromatography electrochemistry amperometric detection
  • Treating method for silver electrodes used for ion chromatography electrochemistry amperometric detection

Examples

Experimental program
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Effect test

Embodiment 1

[0063] (1) According to Al 2 o 3 The volume ratio of powder and deionized water is 1:3 to configure Al 2 o 3 Slurry.

[0064] (2) Evenly drop 4 drops of the Al on the polishing cloth 2 o 3 slurry, the cleaned silver electrode was polished on the polishing cloth at a constant speed for 5 min, and the polishing cloth and the silver electrode were cleaned with deionized water.

[0065] (3) Repeat the above and evenly drop 4 drops of the Al on the polishing cloth 2 o 3 slurry, the cleaned silver electrode was polished on the polishing cloth at a constant speed for 5 min, and the polishing cloth and the silver electrode were cleaned 8 times with deionized water.

[0066] (4) Put the mechanically polished silver electrode in the treatment agent solution at a temperature of 15° C., stir for 5 minutes, take it out, wash it with deionized water and dry it to obtain the treated silver electrode. The above treatment agent solution includes 2g / L AgNO 3 , 1 mL / L of HNO 3 , 0.01 ...

Embodiment 2

[0068] (1) According to Al 2 o 3 The volume ratio of powder and deionized water is 1:4 to configure Al 2 o 3 Slurry.

[0069] (2) Evenly drop 5 drops of the Al on the polishing cloth 2 o 3 slurry, the cleaned silver electrode was polished on the polishing cloth at a constant speed for 6 min, and the polishing cloth and the silver electrode were cleaned with deionized water.

[0070] (3) Repeat the above and evenly drop 5 drops of the Al on the polishing cloth 2 o 3 slurry, the cleaned silver electrode was polished on the polishing cloth at a constant speed for 6 min, and the polishing cloth and the silver electrode were cleaned 9 times with deionized water.

[0071] (4) Put the mechanically polished silver electrode in the treatment agent solution for 7 minutes at a temperature of 20° C., take it out, wash it with deionized water and dry it to obtain the treated silver electrode. The treatment agent solution includes 10g / L of AgNO 3 , 1mL / L of HNO 3 , 0.04 g / L corro...

Embodiment 3

[0073] (1) According to Al 2 o 3 The volume ratio of powder and deionized water is 1:4 to configure Al 2 o 3 Slurry.

[0074] (2) Evenly drop 5 drops of the Al on the polishing cloth 2 o 3 slurry, the cleaned silver electrode was polished on the polishing cloth at a constant speed for 6 minutes, and the polishing cloth and the silver electrode were cleaned with deionized water.

[0075] (3) Repeat the above and evenly drop 5 drops of the Al on the polishing cloth 2 o 3 slurry, polishing the cleaned silver electrode on the polishing cloth at a constant speed for 6 minutes, and cleaning the polishing cloth and the silver electrode with ionized water 10 times.

[0076](4) The mechanically polished silver electrode was placed in the treatment agent solution at a temperature of 25° C., stirred for 9 minutes, taken out, washed with deionized water and dried to obtain the treated silver electrode. The treatment agent solution includes 15g / L of AgNO 3 , 10 mL / L of HNO 3 , 0...

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Abstract

The invention discloses a treating method for silver electrodes used for ion chromatography electrochemistry amperometric detection, and relates to the technical field of ion chromatography electrochemistry amperometric detection. The silver electrodes are placed in a treating agent solution after mechanical polishing, stable silver crystalline grain structures are formed on the surfaces of the silver electrodes through a synergistic effect of orientated growth and orientated corrosion, namely exchange balance of Ag with Ag<+> and e<-> is mainly used, a dissolution prompting effect of HNO3 and methanesulfonic acid is used supplementarily, during orientated corrosion of high energy surface and high activity silver atoms of the silver crystalline grains, low activity silver atoms are generated through orientated sedimentation of low energy surface, and then sulfydryl groups and nitrogen atoms in a corrosion inhibitor are adsorbed to the surfaces of newly generated low activity silver atoms to avoid dissolution, so that the development of dissolution balance to the generation of low activity silver atoms is promoted, a plurality of stable silver crystalline grain structures are formed on the surfaces of the silver electrodes finally, the treated silver electrodes are relatively large in real area, uniform in microstructures and higher in inertia, the detection current value upper limit of ion chromatography electrochemistry amperometric detection can be improved, and the detection life is prolonged.

Description

technical field [0001] The invention relates to the technical field of ion chromatography electrochemical amperometric detection, in particular to a processing method for a silver electrode used in ion chromatography electrochemical amperometric detection. Background technique [0002] Electrochemical detection technology is usually used to measure the change of the electrical signal of the substance. Its principle is to use the redox characteristics of the substance to determine the detection method of the characteristic information of the substance to be measured by measuring the change of the electrochemical parameters in the solution. For example, electrochemical detection technology can be used for the detection of organic compounds containing nitro and amino groups, as well as inorganic anions and cations. Electrochemical detection can be applied in many fields of industrial production and daily life, for example, chemical engineering, biomedicine, food safety, environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 赵健伟赵博儒孙志于晓辉
Owner JIAXING UNIV
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